扩散分光光度法测定蒜粉成分分析标准物质中氟化物不确定度评定
王力君,张明,陈秀娜
青海省地质矿产测试应用中心,西宁 810008
Evaluation on uncertainty for determination of fluoride in certified reference materials for composition analysis of garlic powder by diffusion spectrophotometric
王力君,张明,陈秀娜
Application of geology and mineral resources test center in qinghai province, Xining 810008, China
摘要:对扩散分光光度法测定蒜粉成分分析标准物质(GBW 10022)中氟化物进行不确定度评定。测定结果不确定度的来源包括标准溶液定值、标准溶液配制、试样溶液配制、试样溶液重复性测定、氟化物标准曲线拟合和测量仪器6个分量,其中贡献最大的是氟化物标准曲线拟合引入的不确定度,其次是试样溶液配制引入的不确定度和标准溶液定值引起的不确定度。结果表明,国家标准物质GBW10022中氟化物的定值结果为(33.67±0.582) μg/g(k=2)。
Abstract:The uncertainty of determination of fluoride concentration in certified reference materials for composition analysis of garlic powder(GBW10022) by diffusion spectrophotometry was evaluated. The uncertainty of fluoride test results came from six components, including standard solution value, standard solution preparation, sample solution preparation, sample solution repeatability determination, fluoride standard curve fitting and measuring instrument. The greatest contribution was the uncertainty caused by the standard curve fitting of fluoride, followed by the uncertainty caused by sample solution preparation and the uncertainty caused by the fixed value of the standard solution. The results showed that the uncertainty of fluoride in national standard substance (GBW 10022) was (33.67±0.582) μg/g (k=2).
关键词:氟化物;不确定度;分光光度法
Keywords:fluoride; uncertainty; spectrophotometry
本文引用格式:
王力君,张明,陈秀娜.扩散分光光度法测定蒜粉成分分析标准物质中氟化物不确定度评定[J].化学分析计量,2021,30(7):79.
Wang Lijun,Zhang Ming,Chen Xiuna. Evaluation on uncertainty for determination of fluoride in certified reference materials for composition analysis of garlic powder by diffusion spectrophotometric[J]. Chemical Analysis and Meterage,2021,30(7):79.
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